Round off 9999 yo the nearest 10,100,1000​

10,000

Step-by-step explanation:

10000, 10000, 10000

Step-by-step explanation:

When rounding, we just need to look at the first digit after the "rounding to" digit.

As follows: we adjust the bold digit according to the underlined digit.

In the first case, we need to round the last 9999 - so we round it up.

In the second case, we need to round 9999 - so we round it up.

In the third case, we need to round 9999 - we round up yet again.

6 hours 48 min

step-by-step explanation:

68÷5=13.6

13.6×30=408min=6 hours 48 min.

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